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Troubleshooting for LED Blinking ( 1 time blink ) for A+P type -2
A+P Board Type (
except
LED blinks
1
BL_SOS (LED driver)
If the IC7800 detects
1.abnormal current of backlight LEDs ( = Backlight LED broken or Low(No) VLED voltage )
2.abnormal DC/DC power supply of IC7800 (does not rise up the VLED voltage )
or the IC7800 does not work (No Vcc or No BL_ON/PWM signal or defect itself),
the IC7800 output BL_SOS signal to IC8000
Ex. 55FX600** series
64V(*)
SRV-VLED
D7403
Q7402/04
C7422
T7301
64V(*)
D7406/07
C7424
16V
P
( TNPA6376** )
TX-65/55FX74#/75#/78#, TH/TC-65/55FX800)
Detail error
Q7801
L7815
Q7804
Q7416
Q7417
Q7403/05
SRV-16V
Q7414
(*)VLED : The DC level is different by the LCD panel.
LED blink 1 time.
L7816
124-110V(*)
SRV-VLED1
SRV-VLED2
124-132V(*)
Cathode1
Q7802
LED
Cathode2
Drive
IC7800
Q7803
Vcc
BL-ON
PWM
16V
SUB-ON
Board may defect
Panel / P
1
LCD Module
Anode1
Back
light
Anode2
5
3
7
P3
P2
A02
(Low=Normal)
BL_SOS
15
15
13
13
BL-ON
14
14
PWM
1 - 4
1 - 4
9
9
SUB-ON
<A+P>
LCD Panel
T-CON
board
A
IC8000
SoC
53
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